c语言实现16进制文件读取

 FILE *sf;
	sf = fopen("G://2.txt", "rb");
	int n;
	unsigned char buf[16];
	unsigned long count = 0;
	while((n = fread(buf, sizeof(char), 16, sf)) > 0) {
		int i;

		printf("%08lx ", count);

		for(i=0; i<n; i++) {
			printf("%02x ", (unsigned)buf[i]);
		}

		if(n < 16) {
			for(i=n; i<16; i++) printf("    ");
		}

		for(i=0; i<n; i++) {
			putchar(isprint(buf[i]) ? buf[i] : '.');
		}

		putchar('\n');

		count += 16;

	}
	fclose(sf);